2. A minivan cruising along a straight road at a constant speed of 28 m/s relative to the ground passes a Porsche traveling at 13 m/s in the same direction in a parallel lane. At the instant the minivan passes by, the embarrassed driver of the Porsche steps on the accelerator. If the Porsche maintains a constant acceleration of magnitude 6 m/s2, how long after it was first passed by the minivan does the Porsche overtake it? a) 1.00 s b) 2.00 s c) 3.00 s d) 4.00 s e) 5.00 s